Which of the following are the salient features of the Double-helix structure of DNA?
1. The two chains have antiparallel polarity.
2. The bases in two strands are paired through hydrogen bonds (H-bonds) forming base pairs (bp).
3. The two chains are coiled in a right-handed fashion.
Select the correct answer using the code given below.
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
More than one of the above
5
None of the above